Theorem mapdpglem6

Description: Lemma for mapdpg . Baer p. 45, line 4: "If g were 0, then t would be in (Fy)*..." (Contributed by NM, 18-Mar-2015)

	Ref	Expression
Hypotheses	mapdpglem.h	$$⊢H=\mathrm{LHyp}\left(K\right)$$
	mapdpglem.m	$$⊢M=\mathrm{mapd}\left(K\right)\left(W\right)$$
	mapdpglem.u	$$⊢U=\mathrm{DVecH}\left(K\right)\left(W\right)$$
	mapdpglem.v	$$⊢V={\mathrm{Base}}_U$$
	mapdpglem.s	$$⊢\underset{\dot{}}{-}={-}_U$$
	mapdpglem.n	$$⊢N=\mathrm{LSpan}\left(U\right)$$
	mapdpglem.c	$$⊢C=\mathrm{LCDual}\left(K\right)\left(W\right)$$
	mapdpglem.k	$$⊢\phi \to \left(K\in \mathrm{HL}\wedge W\in H\right)$$
	mapdpglem.x	$$⊢\phi \to X\in V$$
	mapdpglem.y	$$⊢\phi \to Y\in V$$
	mapdpglem1.p	$$⊢\underset{\dot{}}{\oplus }=\mathrm{LSSum}\left(C\right)$$
	mapdpglem2.j	$$⊢J=\mathrm{LSpan}\left(C\right)$$
	mapdpglem3.f	$$⊢F={\mathrm{Base}}_C$$
	mapdpglem3.te	$$⊢\phi \to t\in \left(M\left(N\left(\left\{X\right\}\right)\right)\underset{\dot{}}{\oplus }M\left(N\left(\left\{Y\right\}\right)\right)\right)$$
	mapdpglem3.a	$$⊢A=\mathrm{Scalar}\left(U\right)$$
	mapdpglem3.b	$$⊢B={\mathrm{Base}}_A$$
	mapdpglem3.t	$$⊢\underset{\dot{}}{·}={\cdot }_C$$
	mapdpglem3.r	$$⊢R={-}_C$$
	mapdpglem3.g	$$⊢\phi \to G\in F$$
	mapdpglem3.e	$$⊢\phi \to M\left(N\left(\left\{X\right\}\right)\right)=J\left(\left\{G\right\}\right)$$
	mapdpglem4.q	$$⊢Q=0_U$$
	mapdpglem.ne	$$⊢\phi \to N\left(\left\{X\right\}\right)\ne N\left(\left\{Y\right\}\right)$$
	mapdpglem4.jt	$$⊢\phi \to M\left(N\left(\left\{X\underset{\dot{}}{-}Y\right\}\right)\right)=J\left(\left\{t\right\}\right)$$
	mapdpglem4.z	$$⊢\underset{\dot{}}{0}=0_A$$
	mapdpglem4.g4	$$⊢\phi \to g\in B$$
	mapdpglem4.z4	$$⊢\phi \to z\in M\left(N\left(\left\{Y\right\}\right)\right)$$
	mapdpglem4.t4	$$⊢\phi \to t=\left(g\underset{\dot{}}{·}G\right)Rz$$
	mapdpglem4.xn	$$⊢\phi \to X\ne Q$$
	mapdpglem4.g0	$$⊢\phi \to g=\underset{\dot{}}{0}$$
Assertion	mapdpglem6	$$⊢\phi \to t\in M\left(N\left(\left\{Y\right\}\right)\right)$$

Proof

Step	Hyp	Ref	Expression
1		mapdpglem.h	$$⊢H=\mathrm{LHyp}\left(K\right)$$
2		mapdpglem.m	$$⊢M=\mathrm{mapd}\left(K\right)\left(W\right)$$
3		mapdpglem.u	$$⊢U=\mathrm{DVecH}\left(K\right)\left(W\right)$$
4		mapdpglem.v	$$⊢V={\mathrm{Base}}_U$$
5		mapdpglem.s	$$⊢\underset{\dot{}}{-}={-}_U$$
6		mapdpglem.n	$$⊢N=\mathrm{LSpan}\left(U\right)$$
7		mapdpglem.c	$$⊢C=\mathrm{LCDual}\left(K\right)\left(W\right)$$
8		mapdpglem.k	$$⊢\phi \to \left(K\in \mathrm{HL}\wedge W\in H\right)$$
9		mapdpglem.x	$$⊢\phi \to X\in V$$
10		mapdpglem.y	$$⊢\phi \to Y\in V$$
11		mapdpglem1.p	$$⊢\underset{\dot{}}{\oplus }=\mathrm{LSSum}\left(C\right)$$
12		mapdpglem2.j	$$⊢J=\mathrm{LSpan}\left(C\right)$$
13		mapdpglem3.f	$$⊢F={\mathrm{Base}}_C$$
14		mapdpglem3.te	$$⊢\phi \to t\in \left(M\left(N\left(\left\{X\right\}\right)\right)\underset{\dot{}}{\oplus }M\left(N\left(\left\{Y\right\}\right)\right)\right)$$
15		mapdpglem3.a	$$⊢A=\mathrm{Scalar}\left(U\right)$$
16		mapdpglem3.b	$$⊢B={\mathrm{Base}}_A$$
17		mapdpglem3.t	$$⊢\underset{\dot{}}{·}={\cdot }_C$$
18		mapdpglem3.r	$$⊢R={-}_C$$
19		mapdpglem3.g	$$⊢\phi \to G\in F$$
20		mapdpglem3.e	$$⊢\phi \to M\left(N\left(\left\{X\right\}\right)\right)=J\left(\left\{G\right\}\right)$$
21		mapdpglem4.q	$$⊢Q=0_U$$
22		mapdpglem.ne	$$⊢\phi \to N\left(\left\{X\right\}\right)\ne N\left(\left\{Y\right\}\right)$$
23		mapdpglem4.jt	$$⊢\phi \to M\left(N\left(\left\{X\underset{\dot{}}{-}Y\right\}\right)\right)=J\left(\left\{t\right\}\right)$$
24		mapdpglem4.z	$$⊢\underset{\dot{}}{0}=0_A$$
25		mapdpglem4.g4	$$⊢\phi \to g\in B$$
26		mapdpglem4.z4	$$⊢\phi \to z\in M\left(N\left(\left\{Y\right\}\right)\right)$$
27		mapdpglem4.t4	$$⊢\phi \to t=\left(g\underset{\dot{}}{·}G\right)Rz$$
28		mapdpglem4.xn	$$⊢\phi \to X\ne Q$$
29		mapdpglem4.g0	$$⊢\phi \to g=\underset{\dot{}}{0}$$
30	1 7 8	lcdlmod	$$⊢\phi \to C\in \mathrm{LMod}$$
31		eqid	$$⊢\mathrm{LSubSp}\left(U\right)=\mathrm{LSubSp}\left(U\right)$$
32		eqid	$$⊢\mathrm{LSubSp}\left(C\right)=\mathrm{LSubSp}\left(C\right)$$
33	1 3 8	dvhlmod	$$⊢\phi \to U\in \mathrm{LMod}$$
34	4 31 6	lspsncl	$$⊢\left(U\in \mathrm{LMod}\wedge Y\in V\right)\to N\left(\left\{Y\right\}\right)\in \mathrm{LSubSp}\left(U\right)$$
35	33 10 34	syl2anc	$$⊢\phi \to N\left(\left\{Y\right\}\right)\in \mathrm{LSubSp}\left(U\right)$$
36	1 2 3 31 7 32 8 35	mapdcl2	$$⊢\phi \to M\left(N\left(\left\{Y\right\}\right)\right)\in \mathrm{LSubSp}\left(C\right)$$
37	29	oveq1d	$$⊢\phi \to g\underset{\dot{}}{·}G=\underset{\dot{}}{0}\underset{\dot{}}{·}G$$
38		eqid	$$⊢0_C=0_C$$
39	1 3 15 24 7 13 17 38 8 19	lcd0vs	$$⊢\phi \to \underset{\dot{}}{0}\underset{\dot{}}{·}G=0_C$$
40	37 39	eqtrd	$$⊢\phi \to g\underset{\dot{}}{·}G=0_C$$
41	38 32	lss0cl	$$⊢\left(C\in \mathrm{LMod}\wedge M\left(N\left(\left\{Y\right\}\right)\right)\in \mathrm{LSubSp}\left(C\right)\right)\to 0_C\in M\left(N\left(\left\{Y\right\}\right)\right)$$
42	30 36 41	syl2anc	$$⊢\phi \to 0_C\in M\left(N\left(\left\{Y\right\}\right)\right)$$
43	40 42	eqeltrd	$$⊢\phi \to g\underset{\dot{}}{·}G\in M\left(N\left(\left\{Y\right\}\right)\right)$$
44	18 32	lssvsubcl	$$⊢\left(\left(C\in \mathrm{LMod}\wedge M\left(N\left(\left\{Y\right\}\right)\right)\in \mathrm{LSubSp}\left(C\right)\right)\wedge \left(g\underset{\dot{}}{·}G\in M\left(N\left(\left\{Y\right\}\right)\right)\wedge z\in M\left(N\left(\left\{Y\right\}\right)\right)\right)\right)\to \left(g\underset{\dot{}}{·}G\right)Rz\in M\left(N\left(\left\{Y\right\}\right)\right)$$
45	30 36 43 26 44	syl22anc	$$⊢\phi \to \left(g\underset{\dot{}}{·}G\right)Rz\in M\left(N\left(\left\{Y\right\}\right)\right)$$
46	27 45	eqeltrd	$$⊢\phi \to t\in M\left(N\left(\left\{Y\right\}\right)\right)$$